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37 Wargrave Rd, Twyford, RG10 9PB 12th October 2020 ISSUE 01
NOISEIMPACT ASSESSMENT
Email: [email protected] Tel: 0207 101 9669 Mobile: 07957 553188 Company Registration No. 0249971
CONTENTS
1 INTRODUCTION ...... 3
2 NOISE CRITERIA ………………………………………...... 3 Page | 2 2.1 NATIONAL PLANNING POLICY FRAMEWORK (2018) ……………………………..………3
2.2 NOISE POLICY STATEMENT FOR ENGLAND ………………………………………………...…4
2.3 PLANNING POLICY GUIDANCE ……………………………………………………………………….4
2.4 ACOUSTICS VENTILATION AND OVERHEATING ……………………………………………..5
2.5 BRITISH STANDARD 8233:2014 ……………………………………………………………………..5
3 SITE SURVEYS...... 6
3.1 SITE DESCRIPTION ………………………………………………………………………………………..6
3.2 ENVIRONMENTAL SITE SURVEY PROCEDURE ……………………………………………….7
3.3 EQUIPMENT …………………………………………………………………………………………………7
4 NOISE SURVEY ...... 8
4.1 RAILWAY NOISE …………………………………………………………………………………………..9
5 EXTERNAL BUILDING FABRIC ………………………………………………………………….………..10
5.1 NON-GLAZED ELEMENTS………………………………………………………………………….…10
5.2 SPECIFICATION OF GLAZED ELEMENTS ………………………………………………………11
6 VENTILATION ……………………………………………………………………………………………………12
7 SUMMARY AND CONCLUSIONS ……………………………….…………….…………….……...……13
APPENDIX
A CALCULATIONS …………………………………………………………………………………………………….13
B MEASUREMENTS ………………………………………………………………………………………………..15
C ACOUSTIC TERMINOLOGY...... 16
D VENTILATION ……………………………………………………………………………….……………………….18
E GLAZING………………………………………………………………………………………………………………..23
Author Date Checked Date Description
L. Jennings Tec. IOA 12/10/2020 M.Austin I.Eng. MIOA 15/10/2020 Information.
This report has been compiled by Deane Austin Ltd (DAA) with all reasonable skill, care and diligence in accordance with
generally accepted acoustic consultancy principles. Information contained in this document contains confidential and
commercially sensitive information and shall not be disclosed to third parties.
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1.0 INTRODUCTION
DAA Group has been appointed to carry out a Noise Impact Assessment at 37 Wargrave Rd, Twyford, Page | 3 RG10 9PB. The purpose of the survey is satisfy condition 13 – Planning Application No: 162950 in accordance with the provisions of the National Planning Policy Framework, the Noise Policy Statement for England (NPSE) and the World Health Organisation Guidelines for Community Noise 1999 (WHO) and Wokingham Borough Council Local Plan.
This report presents the results of background noise levels and outlines any necessary mitigation measures
The technical content of this assessment has been provided by a Tech member of the Institute of Acoustics.
The Institute of Acoustics is the UK’s professional body for those working in acoustics, noise and vibration
2.0 NOISE CRITERIA 2.1 NATIONAL PLANNING POLICY FRAMEWORK (NPPF) The Department for Communities and Local Government introduced the National Planning Policy Framework (NPPF) in March 2012. The latest revision of the NPPF is dated July 2018. The NPPF sets out the Government’s planning policies for England and how these are expected to be applied. It provides a framework where local Councils can produce their own local and neighbourhood plans which reflect the needs of their communities. In conserving and enhancing the natural environment, the planning system should prevent both new and existing development from contributing to, or being put at, unacceptable risk from environmental factors including noise. Planning policies and decisions should aim to avoid noise giving rise to significant adverse impacts on health and quality of life as a result of new development. Conditions may be used to mitigate and reduce noise to a minimum so that adverse impacts on health and quality of life are minimised. It must be recognised that development will often create some noise and existing businesses wanting to develop in continuance of their business should not have unreasonable restrictions put on them. Reference is made within NPPF to the Noise Policy Statement for England (NPSE) as published by DEFRA in March 2015
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2.2 NOISE POLICY STATEMENT FOR ENGLAND (NPSE) The long-term vision of the NPSE is stated within the documents scope, to ‘promote good health and a good quality of life through the effective management of noise within the context of Government Page | 4 policy on sustainable development’. The policy aims are stated to: • avoid significant adverse impacts on health and quality of life; • mitigate and minimise adverse impacts on health and quality of life; and • where possible, contribute to the improvement of health and quality of life. The application of NPSE should mean that noise is properly taken into account at the appropriate time (for example in planning applications or appeals) where it must be considered alongside other relevant issues. The guiding principles of Government policy on sustainable development should be used to assist in the implementation of the NPSE. The NPSE should apply to all types of noise apart from occupational noise in the workplace. The types of noises defined in the NPSE includes: • Environmental noise from transportation sources; • Neighbourhood noise which includes noise arising from within the community; industrial premises, trade and business premises, construction sites and noise in the street The Noise Policy Statement England (NPSE) outlines observed effect levels relating to the above, as follows: • NOEL – No Observed Effect Level o This is the level below which no effect can be detected. In simple terms, below this level, there is no detectable effect on health and quality of life due to the noise. • LOAEL – Lowest Observed Adverse Effect Level o This is the level above which adverse effects on health and quality of life can be detected. • SOAEL – Significant Observed Adverse Effect Level o This is the level above which significant adverse effects on health and quality of life occur. As stated in The Noise Policy Statement England (NPSE), it is not currently possible to have a single objective based measure that defines SOAEL that is applicable to all sources of noise in all situations. Specific noise levels are not stated within the guidance for this reason, and allow flexibility in the policy until further guidance is available. 2.3 ProPG: PLANNING AND NOISE As outlined above, the National Planning Policy Framework encourages improved standards of design, although it provides no specific noise levels which should be achieved on site for varying standards of acoustic acceptability, or a prescriptive method for the assessment of noise. ProPG: Planning and Noise was published in May 2017 in order to encourage better acoustic design for new residential schemes in order to protect future residents from the harmful effects of noise. This guidance can be seen as the missing link between the current NPPF and its predecessor, PPG24 (Planning Policy Guidance 24: Planning and Noise), which provided a prescriptive method for assessing sites for residential development, but without the nuance of ‘good acoustic design’ as outlined in ProPG. ProPG allows the assessor to take a holistic approach to consider the site’s suitability, taking into consideration numerous design factors which previously may not have been considered alongside the noise level measured on site, for example the orientation of the building in
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relation to the main source of noise incident upon it. It should be noted this document is not an official government code of practice, and neither replaces nor provides an authoritative interpretation of the law or government policy, and therefore should be seen as a good practice document only.
2.4 ACOUSTICS VENTILATION AND OVERHEATING Page | 5
The AVO Guide includes: an explanation of ventilation requirements under the building regulations and as described in Approved Document F, along with typical ventilation strategies and associated noise considerations; an explanation of the overheating assessment methodology described in CIBSE TM59; potential acoustic criteria and guidance relating to different ventilation and overheating conditions, for both environmental noise ingress and building services noise; and a worked example of the application of the AVO Guide including indicative design solutions. The AVO Guide is intended for the consideration of new residential development that will be exposed predominantly to airborne sound from transport sources, and to sound from mechanical services that are serving the dwellings in question. Although the policy coverage is limited to England, the approach may be applicable in other parts of the UK.
The AVO Guide is intended to contribute to the practice of good acoustic design, as emphasised in the Professional Practice Guidance on Planning and Noise (ProPG). In particular
2.5 BRITISH STANDARD BS 8233:2014 British Standard Code of Practice BS8233:2014 ‘Sound insulation and noise reduction for buildings’ provides recommended guideline value for internal noise levels within dwellings which are similar in scope to guideline values contained within the World Health Organisation Guidelines for Community Noise 1999 (WHO).
A ctiv ity L ocation 07:00 to23:00 23:00 to 07:00
Re s ting Living room 3 5 dB L A e q , 1 6 h o u r
Dining Dining room / are a 4 0 dB L A e q , 1 6 h o u r
Sleeping (daytime resting) Be droom 3 5 dB L A e q , 1 6 h o u r 3 0 dB L A e q , 8 h o u r
2.4.1 Indoor ambient noise levels for dwellings
The WHO guideline noise criteria set an internal sleep disturbance noise limit of 45dB LAmax,F which should not be exceeded on a regular basis.
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3.0 SITE SURVEYS
3.1 SITE DESCRIPTION Page | 6 The site is located within a residential area with the dominant source of noise being road traffic noise from the surrounding roads and from the railway opposite. (See Figure 3.1) (See Figure 3.1 )
Figure 3.1 – Proposed Site
3.2 ENVIRONMENTAL SITE SURVEY PROCEDURE
Measurements were taken free field. See figure 3.2.
Noise measurements were logged over a 24hr period between Wednesday 7th and Thursday the 8th October 2020.
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Primary Recording Location
Figure 3.2 – Measurement Locations
3.3 EQUIPMENT
Instrument manufacturer Cirrus Research Plc
Model CR831B Precision Computing Sound Level Meter
Serial Number C19278FF
Microphone Type MK:224
Serial Number 20041086
Model CEL490 Type 1 (used for sample measurements)
Serial Number 056154
Cirrus CK: 508 Outdoor Kit
Type 1 Acoustic Calibrator
Copies of Calibration certificates are available upon request.
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4.0 NOISE SURVEY
Daily ambient LAeq,T noise levels have been obtained using logarithmic energy based averaging, as Page | 8 well as night-time LAMax levels have been used to form the basis of the calculations and the lowest LA90. These have also been summarised in table 4.1 below.
Period LAeq (15) LA90 (15) LAMAX(15)
07:00 – 23:00 55dB 40dB 77dB
23:00 – 07:00 51dB 34dB 77dB
Table 4.1 Measurement Levels at Primary Assessment Location
Wargrave Rd TIME HISTORY 80.00
70.00
60.00
50.00
40.00
30.00
12:55 16:55 20:55 13:55 14:55 15:55 17:55 18:55 19:55 21:55 22:55 23:55 00:55 01:55 02:55 03:55 04:55 05:55 06:55 07:55 08:55 10:25 11:25 11:55 Leq Lmax LA10 LA90
Figure 4.1.2 – Time History Measurements
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4.1 RAILWAY NOISE The Henley branch line is a branch railway line between Twyford in Berkshire and Henley-on-Thames Page | 9 in Oxfordshire where the line terminates. All passenger services on this branch line are operated by Great Western Railway (GWR) using four car Class 165/166 turbo diesel powered multiple units (DMUs). This line is 4 1⁄2 miles (7.2 km) long and is not currently electrified. Electrification of the branch was initially announced in July 2012 in conjunction with the electrification of the Great Western Main Line. In November 2016 it was then announced that the electrification of the Henley branch was being delayed without any planned date for incorporation. It is presumed that the existing diesel powered trains will remain in operation on the Henley branch line for the foreseeable future. From a junction with the Great Western Main Line at the Twyford railway station, the Henley branch line curves sharply north and passes under the A3032 (Twyford to Charvil Road) at which point the track straightens and passes to the rear of the property in a shallow cutting, with the track bed approximately 4m below the level of the garden of the property. The rear of the house is approximately 29m from the railway track.
The speed limit for the majority of the Henley branch line is stated as being 50 mph except for the curved approach to Twyford, which is 25 mph. At the point at which the line passes the property, the trains are not at the full line speed as they are either accelerating having just exited from the curve or are coasting/breaking into the curve when returning to Twyford.
Henley Branch Line Rail Traffic Pattern From the National Rail online published passenger timetable, current as of August 2020. Monday to Friday 70 train movements each day, of which 10 are between the hours of 23:00 to 07:00
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The first outward train passes the property at about 05:51, the last return train from Henley passes at about 00:28 Maximum of 4 train movements per hour throughout the weekday service period, passing the property at typically 07, 14, 37 and 44 minutes past each hour. Saturday 60 train movements, of which 6 are between the hours 23:00 to 07:00 Page | 10 The first outward train passes the property at about 06:55, the last return train from Henley passes at about 00:08 4 trains per hour between 09:00 and 20:00 and 2 trains per hour in the early morning and late evening. Sunday 28 train movements, all between 07:00 to 23:00. No night service trains. The first outward train passes the property at about 08:40, the last return train from Henley passes at about 22:10 2 trains per hour throughout the Sunday service period. Freight Traffic
No freight traffic is operated on the Henley branch line.
The railway noise is included in the background noise levels. No Vibration was detected from the railway line at the footings of the site.
5.0 EXTERNAL BUILDING FABRIC 5.1 NON-GLAZED ELEMENTS
It is currently assumed that the non-glazed external building fabric elements of the proposed development would be comprised of blockwork. This would contribute towards a significant reduction of ambient noise levels in combination with a good quality secondary-glazed window configuration, as shown in Section 5.2. All non-glazed elements of the building facades have been assumed to provide a sound reduction performance of at least the figures shown in Table 5.1 when tested in accordance with BS EN ISO 140-3:1995.
Octave Band Centre Frequency SRI, dB Element 125 250 500 1K 2K 4K
Non Glazed Element SRI 41 43 48 50 55 55
Table 5.1 Non-glazed elements assumed sound reduction performance
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5.2 SPECIFICATION OF GLAZED UNITS
The glazed units have already been installed. Sound reduction performance calculations have been Page | 11 undertaken in order to see if the glazed elements achieve ‘good’ internal noise levels, shown in Appendix A
The sound reduction index (SRI) value for the glazed elements installed is shown in Table 5.2 and 5.3
Glazing Configuration – 4/20/4/18/6
Frequency, Hz/dB Rw Rw + C Rw +Ctr
125 250 500 1K 2K 39 38 33 18 32 36 43 42
Table 5.2 –Glazing Performance - Bedrooms
Glazing Configuration – 4/20/4/18/6
Frequency, Hz/dB Rw Rw + C Rw +Ctr
125 250 500 1K 2K 39 38 33 18 32 36 41 43
Table 5.3 –Glazing Performance – Living Areas The sound reduction performance stated above must be achieved by the gazing system as a whole in its installed condition. The specification therefore applies to both the glazing element and all seals on any openable part of the system.
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6.0 VENTILATION With windows open, the internal noise levels will be exceeded. To maintain suitable internal noise levels, the minimum required ventilation should be provided when windows are closed. Page | 12
Windows should not be sealed, but openable for times when purge ventilation is required (examples given in Approved Document F including purging of fumes from burnt food when cooking, or removal of fumes when painting).
Ventilation to habitable rooms will require acoustically treated ventilation.
We therefore recommend provision of one of the following acoustic ventilation options:
• Acoustically screened wall mounted mechanical (i.e. powered) acoustic ventilators such as Titon ‘Sonair F+’
• Mechanical Ventilation with Heat Recovery (MVHR) would be to provide each flat with whole house supply and extract ventilation. This comprises of mechanical unit/s that provide both supply and extract to each apartment individually; whereby inlet and outlet ducts would need to be run to the façade or in a riser to the roof. This type of system can also be incorporated with heat recovery built in if desired such as the Titon – HRV 2 Q Plus
• Positive Input Ventilation (PIV) - Positive Input Ventilation (PIV) also sometimes known as positive pressure ventilation work as a whole house ventilation system and create fresh and healthy living environments by supplying fresh, filtered air into a property at a continuous rate throughout, such as the Envirovent Atmos System
Or any other similar performing acoustic ventilators or ventilation system.
At no time shall the ventilation system cause the ambient internal noise levels to exceed the criterion set out in BS8233:2014 shown in table 2.4.1. If heat recovery is to be used, then a summer override switch is advisable.
Example product brochures of some ventilation options including mechanical ventilation with heat recovery systems are presented in Appendix D.
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7.0 SUMMARY AND CONCLUSIONS
A baseline noise survey has been undertaken by DAA Group to establish the prevailing noise climate in the locality of 37 Wargrave Rd, Twyford, RG10 9PB, in support of a planning application for the development of new residential dwelling. Page | 13 The measured levels have been assessed against the National Planning Policy Framework and currently available standards and guidance documents including World Health Organisation Guidelines for Community Noise (1999) and BS8233:2014 Guidance on sound Insulation and noise. The triple glazing used on the development provides very good internal noise levels. Appropriate mitigation measures have been outlined including mechanical ventilation.
It is concluded that there are no further reasons, on noise grounds, why the relevant planning condition should not be discharged provided the above points are taken into consideration.
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APPENDIX A – CALCULATONS BS8233 CALCULATIONS OF NOISE BREAK-IN - 19dB LAeq Living Areas
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1 Room Width 4 Area 48 Leq,2 19 2 Room Height 2.4 RT 0.5 3 Room Depth 5 A 15.456 S 54 4 A0 10 5 Mid-Octave Freq (Hz) 125 250 500 1k 2k
6 Leq,ff 51 49 46 42 38 7 Vent 40 37 34 43 50
8 (A0/S)*10(-Dn,e/10) 0.00002 0.00004 0.00007 0.00001 0.00000
9 Swi 4
10 WindowRwi 18 32 36 41 43 (S /S)*10(-R /10) 11 wi wi 0.00117 0.00005 0.00002 0.00001 0.00000 12 Sew 25 13 Wall Rew 41 43 48 50 55 14 (Sew/S)*10(-Rew/10) 0.00004 0.00002 0.00001 0.00000 0.00000 15 Srr 25 16 Roof Rw 37 42 45 50 56
17 (Sit/S)*10(-Rit/10) 0.00009 0.00003 0.00001 0.00000 0.00000 18 Internal SPL 32.2 20.3 16.6 5.9 -2.9 19 A-Weighting -16.1 -8.6 -3.2 0 1.2 20 A-Weighted levels 16.1 11.7 13.4 5.9 -1.7 21 40.7 14.9 21.7 3.9 0.7
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BS8233 CALCULATIONS OF NOISE BREAK-IN - 16dB LAeq Bedrooms
Page | 15
1 Room Width 4 Area 48 Leq,2 16 2 Room Height 2.4 RT 0.5 3 Room Depth 5 A 15.456 S 54 4 A 10 0 5 Mid-Octave Freq (Hz) 125 250 500 1k 2k 6 Leq,ff 48 46 43 39 35 7 Vent 40 37 34 43 50
8 (A0/S)*10(-Dn,e/10) 0.00002 0.00004 0.00007 0.00001 0.00000
9 Swi 4
10 WindowRwi 18 32 36 43 42 11 (Swi/S)*10(-Rwi/10) 0.00117 0.00005 0.00002 0.00000 0.00000 12 Sew 25
13 Wall Rew 41 43 48 50 55
14 (Sew/S)*10(-Rew/10) 0.00004 0.00002 0.00001 0.00000 0.00000
15 Srr 25 16 Roof Rw 37 42 45 50 56 17 (Sit/S)*10(-Rit/10) 0.00009 0.00003 0.00001 0.00000 0.00000 18 Internal SPL 29.2 17.3 13.6 2.5 -5.4 19 A-Weighting -16.1 -8.6 -3.2 0 1.2 20 A-Weighted levels 13.1 8.7 10.4 2.5 -4.2 21 20.4 7.5 10.9 1.8 0.4
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APPENDIX B - ACOUSTIC TERMINOLOGY Page | 16 B.1 WEIGHTED DECIBEL, dB(A) The unit generally used for measuring environmental, traffic or industrial noise is the A-weighted sound pressure level in decibels, denoted dB(A). The weighting is based on the frequency response of the human ear and has been found to correlate well with human subjective reactions to various sounds. An increase or decrease of approximately 10 dB corresponds to a subjective doubling or halving of the loudness of a noise, and a change of 2 to 3 dB is subjectively barely perceptible.
B.2 EQUIVALENT CONTINUOUS SOUND LEVEL, LAeq
Another index for assessment for overall noise exposure is the equivalent continuous sound level, LAeq. This is a notional steady level which would, over a given period, deliver the same sound energy as the actual time- varying sound over the same period.
B.3 MAXIMUM NOISE LEVEL, LAmax The maximum noise level identified during a measurement period. Experimental data has shown that the human ear does not generally register the full loudness of transient sound events of less than 125 ms in duration.
B.4 NOISE RATING, NR Noise ratings are used as a single figure criterion for specifying services noise in buildings. Each noise rating value has an associated spectrum of defined values in each third or octave frequency band. To determine the noise rating of a room the measured spectrum is compared to a set of noise rating curves. The highest NR curve that crosses any single frequency band of the measurement determines the noise rating for the room. The single figure noise rating is read at the 1 kHz band.
B.5 SOUND LEVEL DIFFERENCE (D) The sound insulation required between two spaces may be determined by the sound level difference needed between them. A single figure descriptor which characterises a range of frequencies, the weighted sound level difference, D, is sometimes used (BS EN ISO 717-1). This parameter is not adjusted to reference conditions.
The standardized level difference, Dn, T is a measure of the difference in sound level between two rooms, in each frequency band, where the reverberation time in the receiving room has been normalised to 0.5 s. This parameter measures all transmission paths, including flanking paths.
The weighted standardized level difference, DnTw, is a measure of the difference in sound level between two rooms, which characterises a range of frequencies and is normalised to a reference reverberation time
B.6 SOUND REDUCTION INDEX (R) The sound reduction index (or transmission loss) of a building element is a measure of the loss of sound through the material, i.e. its attenuation properties. It is a property of the component, unlike the sound level difference which is affected by the common area between the rooms and the acoustic of the receiving room. The weighted sound reduction index, Rw, is a single figure description of sound reduction index characterising a range of frequencies, which is defined in BS EN ISO 717-1: 1997. The Rw is calculated from measurements in an acoustic laboratory
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Page | 17
B.7 STATISTICAL NOISE LEVELS (LA90, (T) LA1, (T) LA10, (T) etc.) For levels of noise that vary widely with time, for example road traffic noise, it is necessary to employ an index which allows for this variation. The LA10 is the level exceeded for ten per cent of the time under consideration, has historically been adopted in the UK for the assessment of road traffic noise. The LA90 is the level exceeded for ninety per cent of the time, has been adopted to represent the background noise level. The LA1 the level exceeded for one per cent of the time, is representative of the maximum levels recorded during the sample period. A weighted statistical noise levels are denoted LA10, dB LA90, dB. etc. The reference time (T) is normally included, e.g. LA10, (5min), & LA90, (8hr).
B.8 TYPICAL NOISE LEVELS Typical noise levels are given in the following table.
Noise Level dB(A) Example
130 Threshold of pain 120 Jet aircraft take-offs at 100 m 110 Chain saw at 1 m 100 Inside disco 90 Heavy lorries at 5 m 80 Kerbside of busy street 70 Loud radio (in typical domestic room) 60 Office or restaurant 50 Domestic fan heaters at 1m 40 Living room 30 Ventilation Noise in Theatre 20 Remote countryside on still night 10 Sound insulated test chamber 0 Threshold of hearing.
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Deane Austin Ltd Company No: 0249971
APPENDIX C – MEASUREMENTS
Primary Measurements Page | 18 Time Leq Lmax LA10 LA90 Time Leq Lmax LA10 LA90 11:55 50.80 63.60 52.80 47.50 23:40 47.80 67.90 48.80 42.10 12:10 52.90 73.50 53.30 46.50 23:55 49.30 73.70 46.60 37.40 12:25 50.50 57.70 52.70 47.30 00:10 40.90 53.00 43.10 35.40 12:40 52.00 74.90 54.80 47.00 00:25 44.90 67.30 43.80 34.60 12:55 50.50 72.50 52.80 45.80 00:40 50.10 74.60 47.70 37.90 13:10 54.40 75.10 55.10 46.40 00:55 45.00 67.20 43.50 36.60 13:25 49.30 65.30 50.60 46.00 01:10 49.80 74.30 46.00 39.90 13:40 52.90 74.90 52.20 46.00 01:25 49.30 77.30 47.50 43.50 13:55 50.40 62.40 52.20 46.90 01:40 43.00 52.20 45.50 38.30 14:10 53.90 75.30 55.30 46.20 01:55 42.10 57.60 43.90 35.80 14:25 50.00 62.90 52.10 46.20 02:10 40.20 55.80 42.00 34.30 14:40 52.80 75.00 51.70 46.20 02:25 39.40 53.70 41.40 34.30 14:55 50.30 67.60 52.10 45.60 02:40 39.50 50.80 41.50 34.90 15:10 54.00 75.40 52.50 46.10 02:55 45.10 58.60 48.50 37.40 15:25 50.00 61.90 51.90 46.70 03:10 45.60 72.40 48.30 36.70 15:40 53.20 74.00 52.00 46.60 03:25 43.50 59.80 46.80 37.50 15:55 51.20 63.40 53.90 46.40 03:40 44.90 57.80 46.60 37.80 16:10 53.10 73.90 53.20 45.50 03:55 43.50 55.10 46.70 37.20 16:25 49.40 59.50 51.50 46.30 04:10 41.90 53.00 44.30 37.30 16:40 54.50 74.00 54.70 48.60 04:25 42.10 60.90 44.50 37.50 16:55 51.50 64.00 52.90 48.00 04:40 44.00 53.70 47.70 37.90 17:10 53.80 75.40 54.30 46.90 04:55 46.10 55.80 49.20 39.70 17:25 50.10 64.70 52.10 46.70 05:10 45.00 55.90 48.00 39.40 17:40 54.40 75.60 54.10 46.90 05:25 42.30 54.20 44.30 37.90 17:55 50.30 63.40 52.40 46.10 05:40 44.80 56.50 48.30 37.90 18:10 50.60 68.00 51.30 46.60 05:55 45.70 58.50 48.30 39.60 18:25 53.80 75.00 54.30 47.20 06:10 48.30 58.80 51.30 41.80 18:40 50.10 67.60 51.40 45.80 06:25 48.30 56.90 52.00 42.80 18:55 52.00 74.50 51.10 45.90 06:40 47.60 56.60 50.60 43.20 19:10 48.30 71.40 50.20 45.20 06:55 51.20 74.40 51.20 43.00 19:25 52.30 75.30 50.50 44.00 07:10 49.00 67.50 50.80 42.70 19:40 47.20 57.80 49.40 43.80 07:25 51.90 74.70 51.60 44.70 19:55 52.30 76.00 49.80 43.20 07:40 50.30 67.40 52.30 44.90 20:10 46.70 55.70 49.10 43.20 07:55 52.90 74.30 56.00 46.60 20:25 52.60 75.90 50.60 42.90 08:10 51.20 68.80 52.50 47.20 20:40 47.40 57.40 49.50 44.10 08:25 53.10 74.70 53.70 48.20 20:55 51.70 74.70 49.30 41.20 08:40 52.90 69.20 54.60 49.60 21:10 45.40 54.20 48.30 40.20 08:55 53.00 74.20 53.00 48.40 21:25 52.70 75.50 50.60 45.20 09:10 51.10 57.50 53.00 48.50 21:40 48.00 56.80 50.50 44.00 09:55 52.00 74.90 53.60 48.40 21:55 52.70 75.30 51.90 45.30 10:10 51.50 64.80 53.50 48.00 22:10 49.10 57.40 51.00 46.40 10:25 53.30 75.40 52.70 48.00 22:25 48.40 67.70 49.90 43.10 10:40 54.00 76.50 54.10 48.20 22:40 45.30 55.40 47.60 41.70 10:55 53.60 75.00 53.50 48.10 22:55 49.90 73.60 47.90 40.80 11:10 50.80 61.60 53.10 47.00 23:10 47.40 67.10 48.60 42.10 11:25 51.50 67.80 53.80 46.50 23:25 50.40 74.10 48.60 42.00 11:40 52.60 73.90 52.70 46.60
T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
APPENDIX D - VENTILATION
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
APPENDIX E - GLAZING
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971
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T: +44(0)202 101 9669. F: +44(0)1252 337266. E: [email protected]
Deane Austin Ltd Company No: 0249971